org.apache.lucene.analysis.ar
Class ArabicNormalizationFilter
java.lang.Object
org.apache.lucene.util.AttributeSource
org.apache.lucene.analysis.TokenStream
org.apache.lucene.analysis.TokenFilter
org.apache.lucene.analysis.ar.ArabicNormalizationFilter
public final class ArabicNormalizationFilter
- extends TokenFilter
A TokenFilter
that applies ArabicNormalizer
to normalize the orthography.
Methods inherited from class org.apache.lucene.util.AttributeSource |
addAttribute, addAttributeImpl, captureState, clearAttributes, cloneAttributes, equals, getAttribute, getAttributeClassesIterator, getAttributeFactory, getAttributeImplsIterator, hasAttribute, hasAttributes, hashCode, restoreState, toString |
normalizer
protected ArabicNormalizer normalizer
ArabicNormalizationFilter
public ArabicNormalizationFilter(TokenStream input)
incrementToken
public boolean incrementToken()
throws IOException
- Description copied from class:
TokenStream
- Consumers (ie
IndexWriter
) use this method to advance the stream to
the next token. Implementing classes must implement this method and update
the appropriate AttributeImpl
s with the attributes of the next
token.
This method is called for every token of a document, so an efficient
implementation is crucial for good performance. To avoid calls to
AttributeSource.addAttribute(Class)
and AttributeSource.getAttribute(Class)
or downcasts,
references to all AttributeImpl
s that this stream uses should be
retrieved during instantiation.
To ensure that filters and consumers know which attributes are available,
the attributes must be added during instantiation. Filters and consumers
are not required to check for availability of attributes in
TokenStream.incrementToken()
.
- Overrides:
incrementToken
in class TokenStream
- Returns:
- false for end of stream; true otherwise
Note that this method will be defined abstract in Lucene
3.0.
- Throws:
IOException
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